Searching for philips brown window crank

I'm afraid I don't know what you have based on a written description alone. In order to help, I will need clear photos of the part in question.

Note that if you need the entire operator mechanism, and not just the crank handle, then I will need you to remove the operator from the window in its entirety before you take your photos. That will ensure that I can see the whole thing without obstruction, and no important details will be missing.